The British broadcaster committed a "serious breach" of media regulations by omitting to mention that the narrator of a film about Gaza was the offspring of a Hamas administrator, as ruled by regulatory body Ofcom.
An inquiry by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has determined that the documentary was "significantly deceptive".
The chief executive of the broadcaster had already issued an apology, stating there had been "a significant failing in relation to factual correctness".
The regulator has directed the BBC to air a peak-time announcement about its decisions.
"As this represents a significant violation of our rules, we are directing the corporation to air a announcement of our determinations against it on the BBC's second channel at 21:00, with a timing to be determined," the statement read.
'Potential to Undermine Credibility'
The regulator's statement stated: "Our probe determined that the programme's omission to reveal that the presenter's father served in a post in the Hamas-run government was materially misleading.
"It meant that the public did not have vital facts which may have been highly relevant to their evaluation of the presenter and the information he provided.
"Confidence is at the heart of the connection between a television network and its public, notably for a public service broadcaster such as the public broadcaster.
"This failing had the possibility to damage the significantly high amounts of confidence that the public would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The programme was pulled from the online platform in February after the narrator's personal associations came to light, and in July an corporation's own inquiry found it infringed the corporation's editorial guidelines on truthfulness.
A representative for the broadcaster said: "The Ofcom ruling is in line with the results of the corporation's inquiry, that there was a major oversight in the programme in relation to the corporation's content standards on factual correctness, which corresponds to regulation 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we agree with the regulator's ruling in full. We will comply with the penalty as soon as the timing and language are determined."
